I wrote this post using this feature for the first time.
I have seen Steemians getting all reward in SBD and maybe they used the Streemian service.
I don't know how it works yet. I used this post itself as the test and wanted others to try it out while SBD is still higher than Steem.
Do you have an example of such a post? I'd be curious to investigate the payout of the post. I will reach out in chat.
You can reach me out on Discord or Steem Chat. Same username :)